Figure



FIGURE 1 'FHJU'RE 2.

VWTNESSES FICUR'E anaal*sono;I

@anni @Wina Letters Potent No.f93,589, dated.' August I, 1869.

:turnover/:ENT IN mmm-Box y The Schedule referteto in these LettersPatent and making part of the lame.

Tok all whom Pit may concern: v

Be it known that I, Serri D. BoWKnR, of Kansas City, Jackson county,Missouri, have made certain "new and useful Improvements in Mitre-Boxes;and =I dohereby declare thatvthe following is a full and truedescription thereof, reference being :had tothe accompanying drawings,vand to thel'etters of reference marked f thereon.

This inventon'relatesto the manner of connecting a pivoted saw-guidewith the table of the mitre-box, and to the manner of .adjusting theposition of saidguide to give the required mitr'e-angleyand saidinvention relates also to the, arrangement of `adjustable "slides withthe table, so that crookedor curved stuff may be readily adjusted andheldupon theltable. V

lo enable those herein skilledto make and use my said invention, I willnow-more fullydeserih tbe-same, referring to the accompanying IFigure 1as a plan; to Figure 2 as a front view; and to Figure 3 as a side view.`v

- I form my said box with a table or baseplate, A,

'by which its rests upon aA Work-bench or other support.-

Upon the rear edge of said table, I secure the back plates or restsl B,these being usually vlight metallic' plates, having a central passagefor the saw. Y

Within the base-plate A, and secured thereto, Iarlange the metallicsector O, the apex whereof', C', receives the pivot-bolt 1),. aboutwhich the radius-plate E turns freely..

-flhe 'ont or outer edge of the sector C is curved as an arc of thecircle whose lcentre is the axis of the bolt 1) and the vradius-plateruns forward and. projects sufficiently beyond saidsector-face to allowthe rib e to deect from the radius-plate, and receive a set-screw, e',by lwhich the plate E may be secured'to the sector C, and thus besecurely held invposition, with reference to the table A. v

The rear end of the radius-plate E projects s0me what beyond the pivotD.

On both ends o f the ladius-plate E, I arrange standards, E,'there beingtwo for each end. Said standards have the setscrew f,"seonring the.saw-guides F, between which the saw is inserted, and which actv toguide the saw in cutting the required mitre.

. The saw-guides F, Iprefer to make of hard wood, placed so that thepassage between them shall be in the direction of the grain, thusreducing the liability to laceration or damage of the edges in insertingor operating the saw.

. The set-screws f have the usual thumb-nuts f1, and

are formed with elongated heads, f2, to give a large bearing-surface onthef. guide-pieces F. y y

In order to adjust the interstice between the-guidepieces F to thedifferent sizesof saws, the hole through which the screw f passes in thesaid guides -is elongated, vas shown in 1ig.,2. y

The st u to be miti-ed is placed upon the table A, and restsagainst theback plates B.

In oi'der that curved or crooked pieces may be better supported, Iarrange, at each end of the table A, the `slide-rests G, which haveproper slots to admit of adjustment by the set-screw g. A Thev .verticalshank. G', of 'said rests, is shaped to move on the upper table-surface,and projects suliciently above said surfaceto furnish the required sup--port to the stullA In` lthe .usual applications. of. mitre-boxes, theangle of the cut is generally forty-live degrees. In orderthat` thisangle may be readily and accurately obtained, I have placed thewoodscrewsH at the end of the cir' cular seetor-surfacein thetable-plateA.

By said screws the radial movement of the radins-V plate E is limited toninety` degrees, and if the stuff to be`cut rests against the backplates B,theV angle cut when the radins-plate is-at either end of itsswing 'will be forty-ive degrees.

If, in use, the parts should become disarranged, and the angle bechanged, then by simply moving the screws H in'or out, a readjustinentmay readily be made.

If an intermediate angle be required, I use the clamps I, which aresecured by their set-screws to the outer edge of the sector, in theposition reqniredto give the saw, between. the guides F, the properangle.

It .will be found that by the use of the devices thus described, mitredwork of every description may be readily executed with true andwell-defined edges, and

4close iit when put together.

It' thought advantageous, the front` ci-rcular face of the sector Cmaybe divided, to indicate in degrees the angles corresponding to thepositions of the radiusplate.

Having thus fully described my said invention,

The arrangementof the table A, back rests B, and

slide-rests G. G', with the sector O, radius-plate E, and

saw-guides-F, when constructedto operate substantially as and for thepulposes set forth.

-S. D. BOWKER.

-Witnesses v Gao. P. Hnn'rnnn, Jr., WILLIAMV W. HERTHEL.

